Type-writing machine



Patented lune 6, |899. C. D. WALLACE.

TYPE WRITING MAcHmE.

(Application led Feb. 3, 1898.)

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WWNESEES No. 626354. Patented lune 6, |899. C. D. WALLACE.

TYPE wniTma MACHINE.

(Applicstioq filed Feb. 3, 189B.) 1Mo Model.) l2 Sheets-Sheet 2.

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No. 626, 354. Patented lune 6, |899. C. D. WALLACE.

TYPE WRITING MACHINE.

[Application tiled Feb. 8, 1898.) (No Model.) I2 Shoah-Sheet 3.

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Nb. 626,354. Patented luna s, |899. c. n WALLACE. TYPE WRITING MACHINE.

(Application Bled Feb. 3, 1898.) (.Nn Model.) I2 Sheets-#Sheet 4.

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No. 626,354. Patented Inno 6., |899. C. D. WALLACE. TYPE WRITING MACHINE.

(Application tiled Fab. 3, 189B.) (No Modal.) I! Sheen-Sheet 5.

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TYPE WRITING` III'ACJHIINE.

(Application led Feb.` 3,` 189B.)

-HE, ATTUENEY No. 626,354. Patented lune 6, |899.

C. D. WALLACE.

TYPE wmme MACHINE.

` (Application led Feb. 3, X898.) (No Windel.) l2 Sheets-Shaet 7.

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. Patented lune. 6, |1899. C. D. WALLACE.

TYPE WRITING MACHINE.

(Application Bled Feb. 3, 1898.) (No Model.) I2 Sheets-Shout BI m m D E W w w ...y /w ..2 NWN Mn QQ@ afm. 5% @uw WITNESSES:

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No. 626,354. Patentedrlune 6, |899. C. D. WALLACE.

TYPE WRITING MACHINE.

I (Applicatinn filed Feb. 3, 1898.) No Model.) I2 Sheets-Sheet 9.

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No. 626,354. Patented lune 6, |899.

c. D. WALLACE.

TYPE WRITING MAGI'IINE.

(Application led Feb. 3, 1898.) (No Model.) I2 Sheets-Sheet I0.

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No. 626, 354. Patented Illne 6, |899. C. I1. WALLACE.

TYPE WRITING MACHINE.

(Application led Feb. 3,' 189B.)

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No. 626,354. Patented lune s, |899. c. n. WALLACE.

TYPE WRITING MACHINE.

(Application fSIed Feb. 3, 1898.) (No Nudel.) I2 Sheets-Sheet I2.

WITNEEEEE INVENTUM? www .3y/IM W HE ATTURNEY Uivrrien STATES PATENT OFFICE.

CASPER D. lVALLACE, OF BRIDGEPOR'I, CONNECTICUT, ASSIGNOR TO THE AMERICAN WRITING MACHINE COMPANY, OF IIJION, NEV YORK.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent NO. 626,354, dated J une 6, 1899.

Application filed February 3j 1898. Serial No. 668,933. (No model.)

To all 1071/071@ zit muy conceive:

Be it known that I, CASPER D. WALLACE, a citizen of the United States, and a resident of Bridgeport, in the county of Fairfield and 5 State of Connecticut, have invented certain new and useful Improvements in Type-Triting Machin es,of which the following is a specification.

My improvements in type-writing machines ro relate to the type-bar action, the escapement mechanism, the line-locking mechanism or means for preventing the printing of one character upon another at the end of a predetermined line, the mode of connecting the plateni 5 carrier to the carriage, means for varying the height of the platen for manifolding-work, means for releasing the platen, so as to rotate it independently of its ratchet-wheel, the ribbon mechanism, and other features which 2o willbe hereinafter referred to; and my objects are to improve the construction and operation of these portions of a type-writing machine.

To these ends my improvements consist in 25 the various features of construction and com! binations of devices hereinafter more fully described, and particularly pointed out in the appended claims.

In the accompanying drawings, Figure 1 is 3o a partial plan view of the machine with certain parts broken away to show other parts below. Fig. 2 is a detail front elevation illustrating the mode of pivoting and mounting the type-bars. Fig. 3 is avertical longitudi- 55 nal section through the center of the machine,

some of the parts being broken away or disconnected. Fig. 4 is a vertical crosssection taken at the line e' of Fig. 1. Fig. 5 is a side View, certain parts being shown in section, to

4o show more particularly the mode of hanging and releasing the rear feed or pressure roll.

Fig. G is a perspective View of one of the paper-guides and its means of attachment. Fig.

is a rear view of the machine, showing the 45 escapement mechanism and its connection with the universal bar, the carriage-mounting, and a portion of the bell mechanism, dac.

Fig. 8 is a plan view of the carriage and the escapement mechanism, various parts being 5o broken away and others omitted for the sake of clearness. Fig. 9 is an end view, partly in section, of the same. Fig. 10 is a plan view, various parts being removed for the purpose of showing more particularly the line locking and releasing devices. Fig. l1 is a side ele- 55 vation thereof, partly in section and with the top plate added. Fig. 12 is a front View of the machine above the top plate. Fig. 12iL is an enlarged front view of the right-hand end of the platen, showing the end bar of the 6o platen-carrier broken away to expose the detent. Fig. 13 is a vertical cross-section through the line 'y gj of Fig. 1, some of the parts being broken away for the sake ot' clearness. Fig. 13 is a detail view, the release-blade being 65 broken away, illustrating the operation of throwing the pinion out of engagement with the carriage-rack. Fig. 14: is a perspective view of the margin-stop devices. Fig. 14

is a'vertical section through the margin-stop 7o of Fig. 14 and showing the locking-lever disengaged from the rack. Fig. 15 is a vertical section showing more particularlyT the ribbon mechanism in front elevation. Fig.

16 is a front view of part of the ribbon- 75 driving mechanism. Fig. 17 is a plan View of the ribbon mechanism. Fig. 1S is a vertical cross-section taken at the line ze of Fig. 17 to show more particularly the ribbonspool mounting. Fig. 19 is an enlarged per- 8o spective sectional view of a portion of the ribbon-spool shaft and illustrating the construction of the ball-bearing devices connected therewith. Fig. 2O is an enlarged vertical section on the line w w of Fig. 'l5 with the 85 base of the side frame partly broken away. Fig. 2l is a side View of the ribbon mechanism from the righthand side, the frame being partly broken away. Fig. 22 is a front view showing in central vertical section 9c. means for releasing the platen from the linespacing devices, so that the platen may be turned freely and independently in either direction and showing also means for raising the platen when it may be desired to do mani- 95 fold work or write upon a number of sheets of paper at one time. Fig. 22 is a Vertical section on the line U o of Fig. 22. Fig. 23 is a plan view of a part of the platen-release and also a part of the line-spacing mechanroo ism. Fig. 2i is a detail perspective View to show the mode of attachment and detach- Y position ment of the platen-carrier frame from the truck or main carriage, the lockingcollar which holds the platen-frame normally in non-detachable condition being turned back to-permit of detachment. Fig. 25 is a view similar to Fig. 24, but showing the lockingcollar in normal position. and the platen-frame as locked against detachment. Fig. 26 is a longitudinal vertical central section of the parts in the condition shown at Fig. 25.

In the various views the same part will be found designated by the same numeral of reference.

1 designates the general framework of the machine. At the base of the machine and near the rear end thereof is a rod 2, which extends across from one side frame to the other and'is secured therein. Upon this rod is pivotally mounted the entire set of key-levers 3 used inthe machine, the said key-levers occupying vertical planes alongside of'and close to one another and there being one key-lever for. each type-bar 4. The key-lever and its associated typebar are -not directly connected together by means of a rod or link, as usual heretofore, butin the following manner, namely: Secured to each key-lever is a strap or loop 5to the upper end of which is pivoted at 6 the lower end of a short link 7, whoseupper end is pivoted at Sto a horizontally-arranged bar 9, which is pivotally connected at` its forward end at 10 to the forward end of an obliquely-arranged shortl link 11, pivoted at its rear and lower end on a rod 12, which extends across the machine and serves as a pivotal support for the entire series of forward links, and the rear end of said bar 9 isvypivoted at.13 to the forward end of a rear .obliquely-arranged link 14, whose opposite `andv lower endis pivotally mounted on a cross-rod 15, which likewise serves as a pivotal support for the entire series ofl rear links. Pivotally secured at 16, ata suitable pointon the length of the bar 9, is a strap or loop 17, to'which, through an adjusting turnbuckle 18,- is-connected the lower end ofa type-baract-uating rod`19, whose upper end is pivotally connected tothe short arm of the typebar` 4, ywhichis pivoted at 20 in a U-shaped hanger or clip 21. The rear end or" each bar 9 `is-c'ut to form a hook 22 to receive one end offv a.coiledspring 23, whose opposite end is attached to a hook 2l, projecting forwardly from a plate 25, attached by a screw 26 to the rear end of the frame or casting. The said spring lserves to return the entire type moveine-ntf from key-leverto type-bar to its normal /Vhen akey-lever is depressed, it turns about its f ulcru m-rod 2,and through the link- 7 the bar 9 is drawn down, the links 1l and 14 swinging downwardly, as illust-rated atFig. 3, andv maintaining the bar 9 alwaysv in a horizontal position. The pulling down of theY bar 9 effects also a downward movement'fothe connecting-rod 19,and thus-causesv an upward-swinging movement of the typebarabout its pivot 20, the type striking the paper on the platen inpthis movement in the usual way. During the downward movement of the bar 9 it also has a slight forward movement, which operates to stretch the spring 23 and impart to it sufficient tension to restore the parts to their first positions when the pressure on the key-lever is released. The drawing down of the bar 9 also effects the carriage-escapement mechanism,as will hereinafter be more fully explained. The keylevers 3 in normal position all lie in substantially the same horizontal plane, and when the draw-bars 9 are in normal position they stand in vertical planes side by side across the machine, with each bar practically in line over its associated key-lever, and when at rest in their normal positions the tops of all of said bars 9 lie in substantially the same horizontal plane.

While the bars 9 are all of equal length, the key-levers vary in length, owing to the fact that their key heads or stems 27 are arranged in seven transverse rows or banks, as shown more particularly at Fig. l3, the key- :levers of the foremost row being longest and those of. the rearmost row shortest. The

`finger-piece 27 is connected to the extremity of its key-lever. Preferably the finger-pieces or key-stems of the last or rearmost four rows pass loosely through guide-bars 28.

Extending across the key-bars is a reed bar or comb l2 9, separating the levers laterally and guiding them in their vibratory movements, and for the purpose of separating and guiding the draw-bars9 there is likewise provided a transverse comb or reed bar 30, which may extend down far enough tolikewise separate -and guide the rear ends of the key-levers, as

shown at Fig. 3. l

By combining the draw-bars with the keylevers through the intermediate links 7 the connecting-rods 19 may be strung or hungin substantially vertical positions, thus reducing to the minimum the wear of the type-bar journals. The key-levers for the entire seriesof banks may have practically the same amount of d ip or depression, and the leverage for all of the key-levers and type-bars may be substantially alike, thus conducing to perfection of touch and action. The actuating-rods 19 are connected to the drawbars at different points of their lengths, according to the positions of the actuatingrods relatively to the circle in which they are arranged, and the links 7 are connected to `the draw-bars at different points, according vkey-levers which extend out to the rearmost bank or row are connected to the vrearmost series of links 7, there being seven transverse lrows of links as well as seven transverse rows of key stems or buttons.

The type-bar brackets or hangers 21 are IOC) supported upon the top plate or type-ring 3l, and for the purpose of reducing the size of the top plate or type-ring to the smallest possible dimensions its brackets or hangers are arranged in pairs and mounted one directly over the other, yet the brackets or hangers of each pair oi" bars are entirely separate and independent of each other, and hence each hanger may be independently moved both radially and laterally in order to adjust the type-bar, so that its type will strike exactly at the printing-center. Each pair of hangers is securely fastened upon the top plate or type-rin g by means of a single screw 32 only, the threaded end of the screw passing into a tapped hole in the top plate and the head of the screw bearing upon a segmental washer $33, laid upon the upper edge of the topmost hanger. In practice this washer is made long enough to overlie three pairs of hangers; but for cach pair of hangers there is a separate screw 32. Between the hangers of each pair is another segmental washer 34, which likewise is preferably made long enough to include three pairs of hangers, and this washer, like the washer 33, is perforated for the passage of the screws. This mode of mounting the type-bar hangers is not only extremely simple and effective, but it enables either hanger of a pair to be adjusted without disturbance ofits fellow. For example,ifit be desired to adjust the upper hanger of the pair shown in Fig. itis simply necessary to loosen the screw and move the hanger to the desired position without giving concern about the disturbance of the hanger below, for this will remain precisely where it is on account of the clamping effect thereupon of the washer 34:, which is still held firmly in position by the other two screws of the remaining two pairs of hangers (not shown) in the group or series of three referred to, and similarly during the adjustment of the topmost hanger, as described, the uppermost washer will for the same reason remain undisturbed. When the said hanger has thus been properly adj usted the screw may be retight-ened to hold it in its new position, and, again, if, for eX- ample, it should be desired to adjust the lowermost hanger after loosening the screw, this may be readily accomplished with affecting the uppermost hanger, which remains tightly clamped between the two washers by means of the two other screws of the series. By making the superposed hangers separate or as individuals not only is it easier to make the adjustments which are required from time to time, but the type-bars may be pivotally mounted in the hangers in the first instance before assemblage in the machine much more conveniently and readily. Each hanger is, as shown at Fig. l, preferably made in U form in plan view, and the inwardlyprojecting arms thereof are preferably pro- 3 vided with an adjusting-screw 35 for holding said arms in parallelism and for adjusting their free ends relatively to the type-bar pivot or journal, and which is preferably formed conical at each end and seated in a like depression in each arm of the hanger.

Owing to the mounting of the hangers one over the other in couples, provision must be made for preventing the two type-bars thus associated from coming in contact when hanging against the type-rest 3G and from clashing when moving to or from the platen in their printing and returning movements. This is accomplished by attaching the eyes or hubs of the type-bars to their respective journals or pivots in different vertical planesin the example shown at Fig. l the hub of the uppermost type-bar being attached to the right of the center of its journal and that of the lower type-bar to the left of the center of its journal; but owing to this arrangement of the type bar hubs in different vertical planes some means must be provided to enable them to strike at the same printing-center, and this is accomplished by mounting the pivots or journals in slightly-oblique positions relatively to a vertical plane passing midway between each pair of pivots, as illustrated in Fig. l, and, as illustrated at Fig. 2, lthe upper pivot or journal is inclined downwardly from the left-hand side and the lower journal or pivot upwardly from the left-hand side, or, in other words, the pivots are arranged at a slight angle to the horizontal plane, passing midway between each pair of pivots, whereby the type ends of the pair of associated type-bars are caused to be separated or held farther apart when said typebars are at rest. By thus mounting the pivots and the type-bars not only may the typebars be made of the same length and be vibrated to strike at the same printing point or center, but also by the peculiar arrangement of the pivots the free or type ends of the bars are maintained at an increased distance apart, and thus there is no liability of the bars clashing in moving to and from the paper or of touching each other while at rest in the basket or support 36. The pivot of the upper type-bar is preferably set slightly farther back than the pivot of the lower typebar, and for this reason the upper type-bar is cut away or formed with a loop 37, which embraces .the lower pivot when the upper type-bar is down in normal position, thus permitting both the upper and lower type-bars to rest side by side against the ring or basket 36.

The type actions, which comprise the series of type-bars, the series of connecting-rods, the series of draw-bars, the series of l\:ey-levcrs, and the series of intermediate links, connect with the carriage-escapement mechanism and will now be described in detail. Located between the series of key-levers and the series of draw-bars and preferablyclose to the under sides of the latter is a roller 3S, which is supported at its ends by pivots 39, Fig. 7, pro jecting laterally from inwardly-extending arms 40, one at cach side of the machine and each `formed integral with or attached to a IIO collar 41, which is secured to a rock-shaft 42, supported at its ends by conical pivots 43, projecting inwardly from the side frames, the ends of the shaft 42 being preferably provided with ball-bearings 44,as indicated at the righthand side of Fig. 7. The roller 38 corresponds in function to the-universal bar of other machines and will be designated as 'such hereinafter. About the middle of the rock-'shaft 42 isA secured by a collar an arm 45', which is provided with aspring 46 and which projects forwardly to engage with the ylower end of an escapement-rod, designated in its entirety by the numeral 46a, but which is preferably composed of several sections. The lower section 47 is made from a piece of sheet metal and is formed-with a slot 48 at its lower end to receive a pin 49 at the free end of the arm 45. Below the slot 48 the section 47 of the rod is provided with a screw 50, upon which is mounted a flanged nut 5l, with which coperatesv the spacing-bar, to be presently referred to. Above the slot 48 the section 47 is bent orshaped to extend'rearwardly and then upwardly, and at its uppermost end said section isatta'ched to a threaded rod or section 52, which-by means lof a turnbuckle or` threaded sleeve 53 is connected to the lower threaded end of-auother rod 54, which at its upper end is securely riveted to a plate 55, the tu'rnbuckle and oppositely-threaded rods providing the means foradj usting the length of the escapern'ent-rod as a whole.v

To the upper end of the plate 55, at the right-hand edge or corner thereof, (viewed frornthe back of the machine,) is'fpivoted at 56 the escapement or feeding dog 57, which dog has a square or straight face and curved orf rounded back, and formed integralwith the dog is a lateral extension 58, projecting leftward and adapted to contact with a pin 59,- fixed above the saine in the upper lefthand corner of the plate 55. On the under side of the lateral extension 58 is' a short downwardly-projecting lug 58a to receive the upper end of a small coiled spring 60, whose lower end is fitted over/an upwardly-projecting'screw 6l, which has a bearing in a forwardlyextending lug 62 on the plate 55. (See Figs. 3 and 7.)

Pivoted at 63, about centrally of the plate 55, is the shorter arm 64 of a bent lever, which Ais pivoted at 65 upon a bracket or stand 66, secured to the top plate, the longer arm 67 of saidbe'nt lever extending vertically upward and-provided at its free end with a forwardlybentl portion or finger 68, which constitutes 'the holding-dog of the escapenrent mechanism. The' feeding-dog 57 and the holdingdog 68 both co'perate with a toothed escapement-wheel 69, which is sleeved or mounted loosely on a driving-shaft 70, whichat its rear f end isformed or provided with a ratchet-wheel 7.1,.with which engage three spring-pressed pawls-72, pivoted in a'circular box or casing 73, formed integral withthe toothed escapement-wheel 69 and on the rear side thereof.

dog 57. u construction shown and described the dog Figs. 7, 8, 9, and 13;) vtached to this bar or carriage and will be re- By this construction the escapement-wheel is 1erationg) but when said shaft turns in the opposite' direction thepawls 72 bob or slide idly over the teeth of the ratchet-wheel and ,the toothed escapeinent-wheel remains at rest',

or, in other words, during the retraction of the carriage for the beginning of a new line of print while the shaft rotates the escapement=wheel remains stationary.

The engaging point or part of the feedingdog 57 is at all times at one side of the linev joining its center of motion or axis 56 with Vthe center of motion of the escape-wheel 69,

and the parts 55, 56, 57, 58, and 59 areso disposed relatively to the said escape-wheel 69 as will secure that'the arc described by the vpoint of the dog 57 when actuated by the `spring 60 will slightly intersect the circle described by the points of the teeth of the ratchet-wheel 69. Froln this construction and arrangement it results that the dog 57 when it is disengaged from one tooth of the rwheel 69 by a downward movement of the bar 46 is immediately thrown by the spring 60,

so as to bring its point within the circle described by the points of the teeth-of the ratchet-wheel 69, thus insuring that the next toothfofl sai-d wheel shall engage with the said It is further observed that in the 57 when'actuated by its'spring 60 moves in a ywhich is pivoted at 76 to the upper portion of the aforesaid stand or bracket 66.

(See Figs. 7, 8, 9, and l0.)

IOO

direction the reverse of the direction of lno- 'tion of the wheel 69 and that its pivot 56 is iai-ranged in a vertical plane to one side of the :vertical plane of the axis of the wheel 69.

IIO

Beneath the swinging bracket or stand 75 isarr'ange'd a flat spring 77, which tends norimally to keep the said plate in an elevated Iposit-ion and with its rear edge against the :head of the stop-screw 78. Y

On the forward end of the shaft 70 is a` smallpinou 79, which normally runs in gear `or mesh' with astraight toothed rack 80, se-

cured to a bar-like carriage 8l, adapted to run wardly-projecting stud 82 one end of the driving cord, strap, or chain 83, the other end of which is attached to the usual spring-drum `84, by which the carriage is propelled from right to left in the usual manner.

In the construction shown fixed guide rails or bearings 85 and 86 for the bar or carriage 8l are supported one over the other in upri'ghts 87, secured upon the top plate. (See The platen-carrier is atferred to after a description of the mode of operation of the escapement mechanism.

lVhen a character-key lever is depressed and its associated draw-bar 9 goes downward and forward, it operates upon the universal bar 8S and its arms #10, and the descent of these devices causes an oscillation of the rockshaft 42 and a depression of the arm 45, whose pin preferably liesnormally at the lower end of the slot 4S of the escapement-rod, and in consequence the said rod is caused to descend instantly with the arm 45. The pulling down ofthe escapement-rod serves to disengage the pivoted dog` 57 from the escapement-wheel 69 and to engage the holdin g-dog with said wheel, the holding-dog vibrating into the path of rotation of said wheel, so as to arrest the same previous to the disengagement of the feeddog. At this time the type prints, but there is no feed of the carriage. Then the feeding-dog is thus disengaged from the escapement-wheel, its spring G0 causes it to turn on the pivot 5G and to vibrate or step a short distance upwardly and toward the right and into the position shown at Fig. 7, where it is in place to catch the next tooth of the escapement-wheel as soon as the latter is released and to limit the same to a one-tooth rotative movement. The downwardly-projectinglug 5S on the bottom of the feeding-dog contacts on the return movement of the latter with the top of the screw G1, thus positively arresting the escapement-wheel step by step as it is released from the holding-dog. The holding-dog being connected to the plate 55 through the bent lever and the feeding-dog being also connected to the said plate, they are in consequence moved in unison, and so that when the holding-dog goes into engagement the feeding-dog goes down out of engagement, and so that when the holding-dog vibrates out of engagement the feeding-dog moves upwardly into engagement. At Fig. 7 one of the draw-bars is shown down in working position and the escapement mechanism in the condition in which it exists when the finger-key is held down and the type is against the paper on the platen. When the pressure on the key-lever is released, the drawbar ascends and leaves the escapement mechanism as a whole to be restored to normal position under theintluence of the spring 46 and which may be assisted by aseparate spring 89, attached to the bracket 66 and connected to the long arm G7 of the bent lever by a loop or yoke 90. In the restoration of the escapement mechanism to normal position the escapement-wheel rotates a distance of one tooth-space, as before described, by means of the spring driving drum St through the strap, carriage, rack, and pinion and shaft, and thus the carriage is fed or spaced step-by-step letter-space distances as it travels from right to left. In order to avoid any possibilityof the escapement-wheel rotating backwardly by friction during the retraction of the carriage, a small pivoted spring-pressed and notched arm 91 is provided, which, as seen at Fig. 7, acts as a positive stop to any reverse rotation of said escapement-wheel; but the said arm does not in any wise prevent the forward or proper rotation of said escapement-wheel, the point of each tooth of the escapement-wheel striking on the upper edge of the said arm and depressing it as it passes by the free end of the same, the spring 02 of said arm acting to immediately restore it to its normal positian after such depression.

In connection with the escapement mechanism is employed a space-key for effecting the requisite spacing between words, the. This space-key is shown at Fig. 3, and comprises two lever-frames connected together and extending from the front edge of the machine back to the escapement-rod. The foremost lever-frame consists of two arms 03, one pivoted at each side of the machine, as indicated at 94, and the front ends of these arms are connected together by a space-key 95, which extends transversely across the keyboard. The rear ends of the lever-arms 93 are bifurcated, as at 96, to receive pins 97 on the forward ends of the arms 08 of the rearmost lever-frame, which arms 0S are pivoted, each at 00, to one of the side frames of the machine and are connected at their rearmost ends by a cross-bar 100, which has a ledge or flange 101, that overlies the flange or head of the nut 51 at the lower end of the escapementrod, the entire construction being such that when the space-key 95 is depressed the flange 101 is also depressed and, striking upon the flange of the nut 51,causes the escapement-rod to descend and the escapement mechanism to operate in the same manner as if the typeaction operated it; but in operating the escapement mechanism through the medium of the space-key the arm 45 remains at rest, and hence the escapement mechanism is restored to normal position by the spring 80 alone, while separate springs (not shown) under the spacing-frames are provided to restore these frames to their normal positions.

The slot 4S in the escapement-rod 40 permits said rod to move downward a limited distance without also carrying downward the arm 45, whose pin stands normally at the bottom of said slot and remains stationary when the space-key is actuated to pull down the escapement-rod.

On the rock-shaft 4:2, and preferably made integral with the arm 45, is an arm 102, which is adapted to strike against a screw-stop 103 for the purpose of limiting the upward movement of the escapement-rod. The position of this screw determines or regulates the extent of the engagement of both dogs with the escapement-wheel.

The purpose of mounting the escapementshaft in the swinging or vibratory plate 75 will now appear in connection with the following description of the mechanism for releasing the carriage from the escapement mechanism to permit of the carriage being moved rapidly IOO IOS

IIO

IIS

in either direction independently 'of the said esc'apement mechanism.

101 isa plate or arm which is pivoted under the plate 75 and at right angles to the pivots of the latter. The rear end of the arm 101 is forked to provide two ,journals 105 for the pivot-pin 106 of said plate, the pin passingthrough the eyes or journals 105 and restingat its ends in bearings in the casting or bracket 6G below the plane of the pivot 76 of the swinging bracket 75. The arm 1051E extends forwardly from its pivot and at about midway of its length is connected to the swiuging plate 75 by means of a rod or bolt 107, and at the foremost end of said arm is an antifriction-roll 108, with which is adapted to engage the horizontal ange or lip 109 at the bottom edge of a vertically-arranged release r'o'd or blade 110, which is pivotall y supported from aboveat two points in its length by means of obliquely-arrangedA links 111, the lower endsof said links being pivoted to the bar or carriage 81 and their upperends to ears formed on said release-bar. The left-hand eud of said release-bar is formed with a finger-piece 112 'and is also preferably furnished withan inclined Vguiding-slot 113, surrounding a fixed screw 114 on the carriage 81. When the said release-bar is pressed inwardly or toward the right, itA simultaneously swings downwardly, and the flange or lip 109, bearing upon the antifriction-roll 108, causes the arm 104: to swing down about its pivot 10G against the stress of a returning-spring 115, surrounding the pivot 10G, and in this Inovement of the said arm the swinging plate 75 is caused also to descend by reason of the condownwardly and its pinion carried out of engagement with the feed-rack 80, thereby re leasing the carriage from its connection with the spacing mechanism and enabling it either to travel swiftly toward the lleft under the force "of the carriage-driving spring or else to be pushed toward the right regardless of the escapement mechanism, as may be desired.

When the pressure upon the release key or' bar is removed, the spring 115 operates to restore the pinion into mesh with the feed-rack and also to bring the arm 10i back to its iirst position. The release-bar is returned to its first position by means of a separate spring 116. (See Fig. 13.) It will be understood, of eourse,that when the escapement-shaft is th us swung downwardly to release the carriage the holding-dog stands back out of engage mentwith the escapement-wheel, and hence affordsno obstruction `to the downward movement of the shaft and its wheel, and inasmuch as the pivoted dog stands in engagement with a tooth of said wheel at near its point or tip the said pivoted dog likewise permits of the requisite amount of downwardl movement of the escapement-wheel to effect the disengagement ofthe rack `andpinion.

l While the escapement mechanism may be disengaged from the main carriage or that carrying the feed-rack by direct manipulation of the release-bar 110, it may also be released by a supplemental key acting through said release-bar and which key is mounted upon the platen frame or carrier 117, which is hinged or pivotally connected to the main carriage in a manner to be presently described.

In bearings on the left-hand end bar of the platen-carrier is mounted a rock-shaft 11S, which at its rearmost end is provided with a crank-arm 119, bearing an antifriction-roller 120, which is adapted to contact with the ange or lip 109 on the release-bar, and at the foremost end of said rock-shaft is a linger piece or key 121, by which the rock-shaft may be conveniently oscillated and the crank-arm roller caused to depress the release-bar and by such depression ettect the swinging down of the escapement-pinion out of engagement with the feed-rack in substantially the manner hereinb'efore described with reference to the separation of the parts by direct action upon the release-bar. The rock-shaft may yhave a separate returning-spring 122, if devsired. rier is down in working position, the disengagement between the rack and pinion may `be more conveniently effected by manipulat- .ing the supplemental or rock-shaft key; but jlwhen the platencarrier is in an upturned or non-working position, where the work may be inspected and corrected, the crank-arm is out iof operative relation to the release-bar, and :hence if at this time it be desired to throw ott' the escapement mechanism this may only be accomplished by direct action upon the release-bar, as at first explained.

necting-rod 107, and thus the shaft is vibrated (See Fig. 1.) Vhen the platen-car- The means for defining the amount of travel volf the carriage in both directions or what is .designated as the margin-stop and the On the front side of the carriage or bar 81V is mounted a bar.123, which is preferably graduated or marked on its front face and for substantially its whole length to .correspond with the letter-spacing or amount of step-bystep travel of the carriage, and in connection with said graduated bar or scale is employed a stop-block 124, which may be used as a pointer or indicator 'and which is preferably secured to the front end of the Vibratory arm 104 and serves in .connection with the said scale-bar to enable the operator to conveniently adjust the carriages for the purpose of making corrections, thc.

The upper edge of the bar 123 is toothed, as at 125, forming between said teeth a series of notches or depressions equal in number and in distance apart to the graduations on the scale. Upon this bar is fitted to slide a margin-stop 120, which limits the returning movement of the carriage, and hence deiiues IOO IIO

the width of the lefthand margin on the sheet being written. Also mounted to slide on said bar is a linesstop 127, which determines the amount of carriage travel toward the left. These stop devices are practically of the same construction, although the line-stop performs a function inthe locking of the printing and escapeinent mechanisms, as `will presently appear, and fo r the pu rpose ofsoun din g an alarm just before the end of the carriage travel the said linc'stop is provided with a pin 128, which is adapted to strike a pivoted bell'trip 129 at the free end ot a lever 8l), pivoted at 131 and provided at its right-hand end with a bellhammer 1232, which is adapted to strike against. a gong 133, fixed on the framework. The bell mechanism is of the ordinary char` acier and need not therefore be further de scribed.

Referring now to the detail construction of the stop devices, Figs. 3, 11, 13, and 14,134 is a three-sided slide with upper and lower rear flanges or lips forming a rectangular box-like structure with a rear slotfrom end to end, so that while the slide or stop is properly supported upon said barit may pass by the several studs or washers 1535, Fig. 3, intervening between the carriage and the scale-bar, and which are provided for the purpose. ot maintaining the latter far enough away from the carriage to enable the employment and convenient manipulation or adjustment ot said stop devices. The box or slide portion 134is formed at its front side with an ear or lug 136, Fig. 14, which is cut through or slotted vertically to receive the body portion of a lever 137, and which is supported upon a transverse pivot 13S, passing through the ear portions and through a hole in the lever. The inner and upper end of the lever is provided with a finger 1256, which is adapted to engage with the notches in the upper edge ot the scale-bar, and thus securely hold the device in any position to which it may be adjusted. The forward end of said lever is formed with a finger-piece 140, which when depressed causes an oscilla-tion of said lever and a removal of the linger 139 from the notch with which it is engaged, and thus leaves the device free to be moved to a new position. In a housing formed in the lug 136 is placed a small spiral spring 141, whose front end is seated in a notch 142 in said lever, and the force of said spring acts on the said lever on that side of its pivot opposite the side on which is located the said finger, so that said spring tends always to keep said linger in engagement with its selected notch. When it may be desired to readj ust the stop devices, it is simply necessary to press down upon the finger-piece 140, thus pressing the spring and raising the finger 1.36 from its notch, and then by a sidewise force upon the lever push or pull the slide along the bar 123 to the desired position for resetting, whereupon the finger will automatically engage the notch upon releasement of the lever. This device has been found in practice to be exceedingly simple in construction and most convenient of manipulation.

Vhile the left-hand stop 126 (shown in Fig. 13) normally contacts with the Vdevice 124, which serves as a stop, as well as a pointer, as before explained, and thus normally defines the extent of retraction of the carriage and the width of left-hand margin on the paper, nevertheless the construction is such that if it be desired to write within the margin the stop 126 may be caused to pass over the stop 124 for this purpose, and this may be accomplished by means of the releasebar or release-key, which when actuated causes the stop 124 to descend, whereby the stop 126 and the carriage may be pushed farther t0- ward the right and beyond the relativelyfixed stop 124. The writing may then be done within the margin, the carriage moving the while step by step toward the left, and the construction is such that when the stop 126 reaches the stop 124 in this movement it-is not arrested thereby, but passes it, thus per mitting the continuous or uninterrupted Writing of the entire line. The stop 126 is adapted to pass by the stop 124 automatically when moving from right to left by reason of the fact that the stop 126 has a slight bevel or curve on its left-hand lower edge, and the stop-block 124 has a similar formation on its upper rightlhand edge, and when these edges engage they operate to depress the arm carrying the stop 124, and then the under side of the stop 126 thereafter keeps the said arm depressed until the stop 126 has fully passed by the stop 124, whereupon it automatically rises to its normal position, where it will serve to arrest the stop 126 and the carriage when they are again retracted or moved back toward the right.

The stop 127, which defines the step-bystep travel of the carriage toward the left, coperates with a lever 143, (see Figs. 10 and 11,) which forms a part of the means for locking the printing mechanism when the carriage has arrived at a predetermined point in the line and which locking means prevents the printing of one character over or upon another after the carriage has come to a halt. The said lever 143 is supported by a vertical pivot 144 on a small bracket 145, which itself is supported by ahorizontal pivot 146 on the bracket or stand 66. The front end of said lever 143 is bent upwardly to terminate in the path of travel ot the line-stop 127 and so as to he influenced thereby when the carriage moves toward the left and is at or near the end of its predetermined travel. The rear end of said. lever enters the upper forked end of avvertically-arranged lever 147, having a horizontal pivot 148 and connected at its lowerend to a horizontally-arranged link 149, which at its right-hand end is pivotally attached to one arm of a bell-crank 1,50, pivoted vertically at 151 on the frame of t-he machine. The longer arm of said hell-crank is forked and connected IOO IOS

to the upright arm 152 of a slide-rod 153, supported in suitable bearings in the framework, and whose forward end is connected to a locking blade or bar 154, which-extends across the machine and is mounted upon apivot-rod 155, Whose ends are supported in bearings in the side frames. A coiled spring 161, surrounding the slide-rod 153 and held between the fixed collar 161 and the rear bearing of the slide, operates to cause the blade 154 to be held upright; but when through-the action of the line-stop 127 the lever 143 is vibrated, and through the levers 147 149 and the bell-crank 150 the rod 153 is slid endwise, the blade or bar 154 is pulled to the dotted-line position shown at Fig. 11, where, it will be observed, its free upper edge stands under the series of horizontall y-arran ged draw-bars il, and it will be understood that when the locking-blade 154 is in this dotted-line position it is impossible forany of the key-levers to be operated, and hence for the escapement mechanism to be acted upon or the type-bars to ascend far enough to effect printing, for these operations can only be produced through the descending action of t-he draw-bar. When the lockingblade is in its normal position, (represented in full lines at Fig. 11,) the draw-bars may be successfully pulled down,'as represented by one of the bars thereat-,and hence there is no interference by said locking-blade with the propermanipul'ation of the printing mechanism and escapement mechanism.

The followingmeans are provided to release the locking devices, so that one or more letters may be added to the line after the carriage has once come to a stop and the printing and escapementmechanisms have once been locked, as explained: Pivoted at 157 in a lug depending from the top platek is a lever 158, to whose rear arm is connected a vertically-arranged sliding pin 159 and to whose front arm is attached a finger-key 160, which projects above the top plate and slides therein. The upper end of the pin 159 terminates at the under side ofthe rear arm of the lever 143 and is adapted to rock saidlever about the pivot 146 of the bracket 145 when the nger-key 160 is depressed, thereby causing the forward arm of the lever 143 to descendbelow the path of travel of the line-stop 127, thus permitting the carriage to advance farther, and at the same time, owing to the removal of the side pressure of the line-stop 127 against the lever 143, the said lever, under the influence of av returning-spring 161, flies back to its normalposition in a vertical plane, and at the same time spring 161 causes a movement of the slide-rod 153 and thelevers 150, 1,49, and. 147 in the opposite direction, and this movement of the slide-rod causes the blade 154,with which it is connected, to swing back to its upright position out ot' the way of 'the draw-bars. Thus at one depression of the key 160 the locking mechanism is released and the arm 143, which acts normallyin conjunction with the stop 127 to arrest the carriage, is moved downaway out of the path of the stop 127, so that the latter may pass over and bearing at its free end against a pin 156a on the bracket 66. By reason of a pin 162, eX- Vtending from arm 104 to lever 143, the hinged arm 104 and the lever 143 are connected t0- gether, so that when the arm is depressed against the tension of its spring 115 the lever 143 is also' depressed against the tension of its spring, and hence when these parts are released the said springs operate to'restore or vibrate the lever 143 and the arm 104 upwardly simultaneously to their normal positions, the arm 104 swinging about its horizontal pivot 106 and the lever about its horizontal pivot 146; but the pin allows of the depression of lever 143 alone without affecting the arm 104, which latter is depressed as the stop 127 moves toward the left by the action of the stop '127 on the cammed or rounded upper edge of stop 124. On the return movement of the carriage, owing to a beveled or rounded lower edge on the right-hand side of the ear 136 of the stop 127, both the arm 104 and the lever 143 are depressed automatically, so that the stop 127 maypass by the same.

It will be understood that when the marginstop 126 has been moved over ou the righthand side of the lever 143 and the stop 124 for the purpose of Writingwithin the margin the said stop 126 passes automatically over both the said devices without arresting the leftward travel of the carriage, there being a beveled or rounded lower corner on the lefthand side of the ear of the stop 126, which acts first on the lever 143 to depress it and then on the stop 124 to depress it, and when the stop 126 has fully passed by the stop 124 the lever 143 and the arm 104 automatically return to their first positions and the stop 124 is brought to a normal position to arrest the return movement of the carriage the next time when the contact-stop 126 thereon is moved to the right with the carriage.

When writing" is done Vbeyond either the margin-stop or the line-stop, the carriage is limited in its travel by means of a lug 165, adapted to contact with either of two fixed stop-pins 166 on the guide-rail S5. (See Fig.

13.) These devices maybe said to constitute permanent stops for the carriage. They also prevent'the carriage from detachment from its ways or rails both when the belt or strap 83 is attached and when it is removed. Of course' if it be desired to detach the carriage this may be accomplished by removing the lug 165 or the pins 166.

The bar or carriage S1 has a V-shaped groove on its .upper edge and also a V-shaped groove on its lower edge, and` the guide-rails S5 and IOD 

